1997年の研究を紹介します。父親が自分の子でない子供を自分の子供だと思って育てている可能性は9 ~ 17%だと推定されました。
In addition, we propose a simple method for estimating the level of paternity uncertainty from kin investment data; application of this method to our data on aunts and uncles suggests that between 13% and 20% of children are not the offspring of their putative father. Our parallel analyses of Euler and Weitzel’s (1996) data on grandparental investment suggest a similar estimate, that paternity uncertainty lies between 9% and 17%.
Matrilateral biases in the investment of aunts and uncles : A consequence and measure of paternity uncertainty
